<template>
  <div>
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <el-card>
      <el-row>
        <el-col>
          <el-alert
            title="添加商品信息"
            type="info"
            center
            show-icon
            :closable="false">
          </el-alert>
        </el-col>
      </el-row>
      <el-steps :space="200" :active="+activeIndex" finish-status="success" align-center>
        <el-step title="基本信息"></el-step>
        <el-step title="参数列表"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
        <el-tabs :tab-position="'left'" v-model="activeIndex"  :before-leave="beforeTabLeave" @tab-click="tabClicked">
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品分类" prop="goods_cat">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                @change="handleChange"></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单item项 -->
            <el-form-item :label="item.attr_name" v-for ="(item,index) in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals" size="mini">
                <el-checkbox :label="itemCheck" v-for="(itemCheck,i) in item.attr_vals" :key="i" border @change="checkboxChange(index)"></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
             <el-form-item :label="item.attr_name" v-for="(item,idx) in onlyTableData" :key="item.attr_id">
              <el-input v-model="item.attr_vals" @input="editChange(idx)"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action 表示图片要上传到的api地址 list-type表示预览效果-->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess">
              <el-button size="small" type="primary">点击上传</el-button>
              <!-- <div slot="tip" class="el-upload__tip">只能上传jpg/png文件，且不超过500kb</div> -->
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器内容 -->
            <quill-editor v-model="addForm.goods_introduce">

            </quill-editor>
            <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>
    <!-- 图片预览 -->
    <el-dialog
      title="图片预览"
      :visible.sync="previewVisible"
      width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
  </div>
</template>
<script>
import _ from 'lodash'

export default {
  data () {
    return {
      activeIndex: '0',
      // 添加商品表单数据对象
      addForm: {
        goods_name: '',
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片数组
        pics: [],
        // 商品详情描述
        goods_introduce: '',
        attrs: []
      },
      addFormRules: {
        goods_name: [
          { required: true, message: '请输入商品名称', trigger: 'blur' }
        ],
        goods_price: [
          { required: true, message: '请输入商品价格', trigger: 'blur' }
        ],
        goods_weight: [
          { required: true, message: '请输入商品重量', trigger: 'blur' }
        ],
        goods_number: [
          { required: true, message: '请输入商品数量', trigger: 'blur' }
        ],
        goods_cat: [
          { required: true, message: '请选择商品分类', trigger: 'blur' }
        ]
      },
      catelist: [],
      cateProps: {
        expandTrigger: 'hover',
        label: 'cat_name',
        value: 'cat_id',
        children: 'children'
      },
      manyTableData: [],
      onlyTableData: [],
      uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
      // 图片上传组件的headers请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem('token')
      },
      previewPath: '',
      previewVisible: false
    }
  },
  created () {
    this.getCateList()
  },
  methods: {
    // 获取所有商品分类数据
    async getCateList () {
      const { data: res } = await this.$http.get('categories')
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类数据失败')
      }
      this.catelist = res.data
    },
    // 级联选择器选中项变化触发
    handleChange () {
      // console.log(this.addForm.goods_cat)
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
        return this.$message.error('只允许选择三级分类')
      }
    },
    // activeName：即将进入的标签页名字
    // oldActiveName：即将离开的标签页名字
    beforeTabLeave (activeName, oldActiveName) {
      // console.log(activeName, oldActiveName)
      if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3) {
        this.$message.error('请先选择商品分类')
        return false
      }
    },
    async tabClicked () {
      // console.log(this.activeIndex)
      if (this.activeIndex === '1') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'many' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取动态参数失败')
        }
        res.data.forEach(item => {
          item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
        // console.log(this.manyTableData)
      } else if (this.activeIndex === '2') {
        const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`, { params: { sel: 'only' } })
        if (res.meta.status !== 200) {
          return this.$message.error('获取静态属性失败')
        }
        this.onlyTableData = res.data
        // console.log(this.onlyTableData)
      }
    },
    async editDataFnc (index) {
      const { data: res } = await this.$http.put(`categories/${this.cateId}/attributes/${this.cateData[index].attr_id}`, {
        attr_name: this.cateData[index].attr_name,
        attr_sel: this.cateData[index].attr_sel,
        attr_vals: this.activeIndex === '1' ? this.cateData[index].attr_vals.join(' ') : this.cateData[index].attr_vals
      })
      if (res.meta.status !== 200) {
        return this.$message.error('修改参数项失败')
      }
      // this.$message.success('修改参数项成功')
    },
    checkboxChange (index) {
      // console.log(this.manyTableData)
      this.editDataFnc(index)
    },
    editChange (index) {
      this.editDataFnc(index)
    },
    // 处理图片预览效果
    handlePreview (file) {
      // console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片的操作
    handleRemove (file) {
      // console.log(file)
      const filePath = file.response.data.tmp_path
      const i = this.addForm.pics.findIndex(item =>
        item.pic === filePath
      )
      this.addForm.pics.splice(i, 1)
      // console.log(this.addForm)
    },
    // 监听图片上传成功的事件
    handleSuccess (response) {
      // console.log(response)
      if (response.meta.status !== 200) {
        return this.$message.error('图片上传失败请重试')
      }
      const picInfo = { pic: response.data.tmp_path }
      this.addForm.pics.push(picInfo)
      // console.log(this.addForm)
    },
    add () {
      // console.log(this.addForm)
      this.$refs.addFormRef.validate(async valid => {
        if (!valid) return this.$message.error('请填写必要的表单项')
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理attrs 动态参数和静态属性
        this.manyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals.join(' ') }
          this.addForm.attrs.push(newInfo)
        })
        this.onlyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        // console.log(form)
        const { data: res } = await this.$http.post('goods', form)
        if (res.meta.status !== 201) {
          return this.$message.error('添加商品失败')
        }
        this.$message.success('添加商品成功')
        this.$router.push('/goods')
      })
    }
  },
  computed: {
    cateId () {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[this.addForm.goods_cat.length - 1]
      }
      return null
    },
    cateData () {
      if (this.activeIndex === '1') {
        return this.manyTableData
      } else if (this.activeIndex === '2') {
        return this.onlyTableData
      }
      return null
    }
  }
}
</script>
<style lang="less" scoped>
  .el-checkbox {
    margin: 0 10px 0 0 !important;
  }
  .previewImg{
    width: 100%;
  }
  .btnAdd{
    margin-top: 15px;
  }
</style>
